Saw sharpening and gumming machine.



PATENTED OCT. 3, 1905.

J, MOORE, JR. SAW SHARPENING AND GUMMING- MACHINE.

APPLICATION FILED APR. 22, 1905.

3 SHEETS-SHEET 1.

w. s v v av x I N MR PATENTED 00123, 1905.

I J. MOORE, JR SAW SHARPBNING AND GUMMING MACHINE.

APPLICATION FILED APR. 22. 1905.

Q s SHBETS-SHBET a, p Q w e Q Q Q El a Q 5 EIT E i x (A.VP- Q9 Y Q" g Qi a v o Q8 Q I) 5i i. ['1 O r -6 U 0 INVENTOR UNITED STATES PATENTOFFICE.

SAW SHARPENING AND GUIVIIVIING MACHINE.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed .Lpril 22, 1905. Serial N0. 256,919.

To (LZZ whom. it may concern.-

Be it known that I, JEssE MOORE, Jr., a citizen of the United States,residing at Sharon, in the county of Taliaferro and State of Georgia,have invented new and useful Improve ments in Saw Sharpening andGrumming Machines, of which the following is a specification.

My invention is a gin-saw sharpening and gumming machine, and moreparticularly a machine of this kind having crossed reciprocating filesfor sharpening the saw-teeth and a die-cutter for gumming by removingthe metal from the bases of the teeth.

improved means for feeding the saws are also provided; and the inventionconsists in certain novel features of construction hereinafter describedand claimed.

In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 afront elevation, of the machine. Fig. 3 is a top plan view. Fig. 4 is anelevation of the feed-index, the side opposite the one in Fig. 1 beingshown. Fig. 5 is a sectional detail showing the mannor in which theindex is clamped to the saw. Fig. 6 is a sectional detail on the line 66 of Fig. 3.

Referring specifically to the drawings, 10 indicates the bed -plate orbase of the machine, at the rear end of which are pillow: blocks 11, inwhich the drive-shaft 12 is journaled. One end of the drive-shaft isfitted with a crank 13 or other suitable means for imparting motionthereto. mounted on the drive-shaft, meshes with a pinion 15, the latterbeing mounted on a shaft 16, having its bearings in posts 17, risingfrom 'the bed-plate. At the front end of the bedplate is a post 18,having laterally-projecting arms 19, on which the bearings of thefileholders 21 are pivotally mounted, as at 22. The files are indicatedat 23 and are fastened to the holders by set-screws or in any othersuitable manner. At the ends of the shaft 16 are cranks 24, which areconnected by pitmen 25 with the file-holders. The files are crossed, asusual in gin-saw-sharpening machines, and are reciprocated by rotatingthe drive-shaft 12 through the gearing described. As the file-holdersextend and move at an oblique angle to the axis of the shaft 16, thepitmen are connected to the cranks 24 and the fileholders bygimbal-joints 26. The bearings 20 being pivoted, the file-holders can beadjusted to vary the angle at which the files engage the saws. A tensiondevice for regu- A spur-wheel 14,

lating the pressure of the files against the saw-teeth is provided andcomprises a coiled spring 27, connecting the rear ends of the bearings20. One of said bearings has a bracket 28, provided with a number ofeyes 29, to receive one end of the spring to enable the tension of thelatter to be adjusted to vary the degree of pressure of the filesagainst the saws. The file-holders are formed with spiral grooves 30,which receive pins 31, extending through the bearing 20, whereby theholders are given a rotary movement as they are reciprocated in theirbearings, and the files are thus given a rolling reciprocating movement.

The die-cutter or punch 32 for gumming is secured to a bell-crank 33,which is fulcrumed at 34 on top of a plate 35, bolted to the base 10.The plate has a projecting portion 36, which extends outwardly from thebase and to which the die 37 is bolted. The cutter is fastened by aset-screw 38 in a recess made in the outer end of one of the arms of thebell-crank, said arm projecting beyond the base to bring the cutteropposite the die. The cutter is operated by means of an eccentric 39 onthe shaft 12, the eccentric-rod being connected with the bell-crank. Astripper-plate bolted to the bed-plate is indicated at 40.

The feed mechanism comprises a pawl which is in two parts, 41 and 41,respectively, each of said members being slotted, as at 42, and havingprojecting pins 43, the pin of one of the members fitting in the slot ofthe other. This construction enables the pawl to be lengthened orshortened, according to the size of the saw or the number of its teeth.A thumb-nut holds the parts in adjusted position.. A block 45 fitsloosely on the shaft 12, and the latter is formed with a depression 46.The block carries a supporting-bracket for the pawl, said bracketcomprising a plate 47 having downturned ends 48 provided with alinedholes, through which the pawl member 41 extends. The block also has anopening 49, through which the member 41 extends into contact with theshaft. A spring 50 is coiled around the member 41 and confined between apin 51, extending therethrough and through one of the ends 48. Thedepression 46, made in the shaft 12, forms a cam which acts on thebeveled end 52 of the pawl member 41, and thus imparts motion to thepawl, said end 52 being continually held in contact with the shaft bythe spring 50.

LIO

. from the plate 53.

The feed-pawl eotiperatcs with an index to feed the saws. The indexcomprises a flat annular plate 53, which is in two sections connected bya hinge 54. The free ends of the sections are fastened together by athumbnut which is screwed on a threaded stem 56, extending from one ofthe sections through a slot 57 in the other. A number of plates 58 arepivotally secured to one side of the plate 53, as at 59, and carryprojecting stems 60, on which two buttons 61 are mounted. These stemsextend through slots 62 in a second flat annular plate 63, which isspaced from the plate 53 by the buttons 61. The plate 63 is also in twosections, which are connected by a hinge 63 adjacent the hinge 54, andhas guide-slots 64, receiving pins 65, projecting The outer ends of thestems are threaded to receive nuts 66. The slots 62 extend diagonallyacross the plate 63 and by their engagement with the stems 60 act ascams to move the buttons 61 inwardly or outwardly when the plate 63 isshifted around, the plates 58 swinging freely on their pivots 59'. Theplate 63 is actuated by a crankshaped stem 67, mounted in the plate 53and extending through a slot 68 in the plate 63. The stem 67 is fittedwith an operating-levcr 69, and a rack 70, secured to the plate 53, isprovided for locking the lever in any desired position. The guide-slots64 are so arranged that the plate 63 swings concentrically with respectto the plate 53. The periphery of the plate 53 is notched, as at 71,which notches are engaged by the feed-pawl.

To fasten the index to the saw. it is swung open, as shown by dottedlines in Fig. 4. The saw is placed between the plates 53 and 63, and theindex is closed and fastened by the thumb-nut 55. The plate 63 is nowswung around by means of the crank and lover, whereby the stems 60, byreason of their engagement with the slots 62, are caused to approach theedge of the saw. The plate is swung around until the stems tightly bindthe edge of the saw, after which the lever 69 is locked in the rack 70.The buttons 61 engage the saw on its sides, and upon tightening up thenuts 66 the saw is tightly clamped on its sides. As the clamping meansdescribed move together when the plate 63 is swung, the index will beproperly centered on the saw. The saw is fed by the engagement of thepawl with the notches 71, the pawl being actuated by the cam arrangementon the drive-shaft 12, heretofore described.

The operation of the machine is as follows: The machine is fastened to asuitable support 72 by clamps 73 bolted to the base 10. The arbor 74, onwhich the saws 75 are mounted, is journaled in a supporting-frame 76.The

machine is adjusted so that the die-cutter takes the first saw at theleft end of the arbor. In this position the files are to the left of allthe saws. The feed-pawl is put on the shaft 12 at the right side of themachine. a depression 46, as heretofore described, being made in theshaft near each end, so that the pawl can be placed on either side ofthe machine. The index is clamped to a saw opposite the feed-pawl, so asto be engaged by the latter. The drive-shaft 12 is now rotated until thefirst saw is gummed, the cutter removing the metal at the bases of theteeth, and the pawl. through the index, feeding the saw. The machine isnow moved to the right to take the next saw, and the index is alsoremoved and fastened to the next saw, after which the second saw isgummed, as before. After gumming three or four saws in this manner thefiles reach the first saw that was gummed, so that thereafter the filingand gumming operation is simultaneous. The machine and index are movedone saw to the right until the index reaches the last saw on the rightend of the arbor, after which the feed-pawl is removed and placed on theopposite end of the drive-shaft and the index on a saw on the left endof the arbor. The operation of the machine is now continued until allthe saws are filed and gummed.

The index will be made in various sizes to suit different saws, and eachindex will have as many notches as there are teeth on the saw for whichit is intended. The pin-and-slot connection of the feed-pawl membersenables the feed-pawl to be properly adjusted according to the size ofthe index used and also enables the feed to be correctly started. Thenotches 71 on the plate 53 being uniformly spaced, the feed is accurateand the teeth are correctly sharpened. By an adjustment of the saws theteeth can be given any desired angle or slant. Thus if the teeth are toostraight the saws are lowered, and if the teeth are too slanting thesaws are raised, as shown by dotted lines in Fig. 1. In these positionsthe die-cutter engages the saws at the proper angle to give the teeththe desired slant.

The machine can be used to gum or file separately, if desired. Byremoving the cutter it can be used as a filing-machine only, and byremoving the spur-wheel 14 it can be used as a gummer only.

Having thus described my invention, what is claimed as new, and desiredto be secured by Letters Patent, is

1. In a saw-sharpening machine, a feed-index comprising an annular platehaving a notched periphery; swinging pins carried by the plate; meansfor swinging said pins into engagement with the edge of the saw;clamping means to engage the sides of the saw carried by the pins; and afeed-pawl engaging the notches.

2. In a saw-sharpening machine, a feed-index comprising an annular platehaving a notched periphery; swinging pins carried by the plate; meansfor swinging said pins into IO the pins into engagement With the sawedge;

clamping means carried by the pins to engage the saw on opposite sides;and a feed-pawl engaging the notches.

' In testimony WhereofI have signed my name to this specification in thepresence of two sub- 5 scribing Witnesses.

JESSE MOORE, J R. Witnesses:

G. L. MOORE, NM. T. F LYNT.

